Greek Yogurt (Plain, Nonfat)

The unique blend of fast-digesting whey and slow-release casein simultaneously stimulates immediate muscle protein synthesis and extends satiety, making it a versatile post-workout recovery snack. Each serving provides 15–20% of the daily value for calcium, along with iodine, potassium, and live probiotic cultures (Lactobacillus and Bifidobacterium)—clinical benefits absent from nearly every competitor on the list. For GLP-1 users, the probiotics help mitigate gastrointestinal side effects, a unique advantage. Priced at $2 to $4 per cup, it is not the cheapest option per gram of protein—cottage cheese and eggs are cheaper—but its mix of protein completeness, probiotic benefit, and ubiquitous availability from brands like Fage and Chobani makes it a strong choice.